I do not think you have a defamation claim, but based upon the facts you have relayed, you should be able to fight the eviction. You need to consult with an attorney specializing in landlord/tenant law in your area as soon as possible.
As the above attorney maintains, your best course of action would be to retain a landlord tenant lawyer in your city from Avvo.
Licensed in Pennsylvania & New Jersey & Serving the Nation. Only 29% Fee Deducted. 1-877-258-3083. www.InjuryLawyerPhiladelphia.com
You will likely have a challenge winning a defamation case against your landlord. I agree with advise to seek counsel from an attorney concentrating in disputes between landlords and tenants.
Sign up to receive a 3-part series of useful information and advice about personal injury law.